Please explore the use of the audio effect PitchShifter and determine if it applies to your situation and works for you.
In Premiere Elements 10
and then editing of the effect by clicking on Edit Effects to bring up the Properties Palette/PitchShifter Panel expanded options including the Presets
icon to the far right of the PitchShifter Panel.
Please refer to the following
Please let us know if any of that targeted your question.